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Q: When was ultra violet light first used by the police?
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Related questions

What is the comparison between visible light and ultra violet light?

You can see visible light but not ultra violet light.


Individual wavelength of visible ultra violet?

Ultra violet light is not visible!


What type of light is at 365nm?

It is ultra violet light.


Do plants need ultra violet light?

no


What kind of light drives photosynthesis?

Ultra Violet light


Which of the following electromagnetic waves are produced by the sun A infrared waves B visible light C ultra violet light D all of the above?

C ultra violet light


Is ultra violet rays visible in light region?

no


Which form of visible light is harmful?

UV (ultra violet) light


Does ultraviolet light have a lower frequency than visible light?

No, "infra" means below, "ultra" means above. Infra red light is below red and ultra violet is above violet light.


What are the differences between ultraviolet light and visible light?

ultra violet is stronger


Does ultra-violet light have longer wave-length than visible light?

No.


Does ultra violet light have a lower or higher wavelength then visible light?

Lower